Yamaha MT-09 2021 - Page 678

9-248
P2122, P2123, P2127, P2128, P2138
3. Wire harness continuity.
• Disconnect the accelerator position sensor coupler “1” and ECU coupler “2”.
• Open circuit check
• Short circuit check
TIP
Disconnect the ECU related connectors before checking.
Refer to “PARTS CONNECTED TO THE ECU” on page 9-4.
Is it in the “Recovered” condition?
YES
→ Go to step 6, and complete the service.
NO
→ Go to step 3.
Between accelerator position sensor coupler “1”
and ECU coupler “2”
[P2122, P2127] yellow/red–yellow/red
[P2122, P2127] white/red–white/red
[P2122, P2123, P2127, P2128, P2138] yellow–
yellow
[P2123, P2128] white/black–white/black
[P2123, P2128] yellow/black–yellow/black
[P2122, P2123, P2127, P2128, P2138] brown–
brown
Is resistance 0 Ω?
YES
→ Go to “Short circuit check”.
NO
a. Replace the wire harness.
b. Turn the main switch to “ON”, and then check the condition of the DTC using the malfunction
mode of the YDT.
Is it in the “Recovered” condition?
YES
→ Go to step 6, and complete the service.
NO
→ Go to “Short circuit check”.
Br
W/R
Y/R W/B
Y/B
Y
R/WBr/Y
LG
W/R
Y/R
W
Y
Br
B/L
Y/B
B
W/B
21